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Diffstat (limited to 'src/mame/video/goindol.c')
-rw-r--r--src/mame/video/goindol.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/src/mame/video/goindol.c b/src/mame/video/goindol.c
new file mode 100644
index 00000000000..5fa3914c396
--- /dev/null
+++ b/src/mame/video/goindol.c
@@ -0,0 +1,143 @@
+/***************************************************************************
+ Goindol
+
+ Functions to emulate the video hardware of the machine.
+
+***************************************************************************/
+
+#include "driver.h"
+
+UINT8 *goindol_bg_videoram;
+UINT8 *goindol_fg_videoram;
+UINT8 *goindol_fg_scrollx;
+UINT8 *goindol_fg_scrolly;
+
+size_t goindol_fg_videoram_size;
+size_t goindol_bg_videoram_size;
+int goindol_char_bank;
+
+static tilemap *bg_tilemap,*fg_tilemap;
+
+
+
+/***************************************************************************
+
+ Callbacks for the TileMap code
+
+***************************************************************************/
+
+static TILE_GET_INFO( get_fg_tile_info )
+{
+ int code = goindol_fg_videoram[2*tile_index+1];
+ int attr = goindol_fg_videoram[2*tile_index];
+ SET_TILE_INFO(
+ 0,
+ code | ((attr & 0x7) << 8) | (goindol_char_bank << 11),
+ (attr & 0xf8) >> 3,
+ 0);
+}
+
+static TILE_GET_INFO( get_bg_tile_info )
+{
+ int code = goindol_bg_videoram[2*tile_index+1];
+ int attr = goindol_bg_videoram[2*tile_index];
+ SET_TILE_INFO(
+ 1,
+ code | ((attr & 0x7) << 8) | (goindol_char_bank << 11),
+ (attr & 0xf8) >> 3,
+ 0);
+}
+
+
+
+/***************************************************************************
+
+ Start the video hardware emulation.
+
+***************************************************************************/
+
+VIDEO_START( goindol )
+{
+ bg_tilemap = tilemap_create(get_bg_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 8,8,32,32);
+ fg_tilemap = tilemap_create(get_fg_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,32,32);
+
+ tilemap_set_transparent_pen(fg_tilemap,0);
+}
+
+
+/***************************************************************************
+
+ Memory handlers
+
+***************************************************************************/
+
+WRITE8_HANDLER( goindol_fg_videoram_w )
+{
+ goindol_fg_videoram[offset] = data;
+ tilemap_mark_tile_dirty(fg_tilemap,offset / 2);
+}
+
+WRITE8_HANDLER( goindol_bg_videoram_w )
+{
+ goindol_bg_videoram[offset] = data;
+ tilemap_mark_tile_dirty(bg_tilemap,offset / 2);
+}
+
+
+
+/***************************************************************************
+
+ Display refresh
+
+***************************************************************************/
+
+static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect, int gfxbank, UINT8 *sprite_ram)
+{
+ int offs,sx,sy,tile,palette;
+
+ for (offs = 0 ;offs < spriteram_size; offs+=4)
+ {
+ sx = sprite_ram[offs];
+ sy = 240-sprite_ram[offs+1];
+
+ if (flip_screen)
+ {
+ sx = 248 - sx;
+ sy = 248 - sy;
+ }
+
+ if ((sprite_ram[offs+1] >> 3) && (sx < 248))
+ {
+ tile = ((sprite_ram[offs+3])+((sprite_ram[offs+2] & 7) << 8));
+ tile += tile;
+ palette = sprite_ram[offs+2] >> 3;
+
+ drawgfx(bitmap,machine->gfx[gfxbank],
+ tile,
+ palette,
+ flip_screen,flip_screen,
+ sx,sy,
+ cliprect,
+ TRANSPARENCY_PEN, 0);
+ drawgfx(bitmap,machine->gfx[gfxbank],
+ tile+1,
+ palette,
+ flip_screen,flip_screen,
+ sx,sy + (flip_screen ? -8 : 8),
+ cliprect,
+ TRANSPARENCY_PEN, 0);
+ }
+ }
+}
+
+VIDEO_UPDATE( goindol )
+{
+ tilemap_set_scrollx(fg_tilemap,0,*goindol_fg_scrollx);
+ tilemap_set_scrolly(fg_tilemap,0,*goindol_fg_scrolly);
+
+ tilemap_draw(bitmap,cliprect,bg_tilemap,0,0);
+ tilemap_draw(bitmap,cliprect,fg_tilemap,0,0);
+ draw_sprites(machine,bitmap,cliprect,1,spriteram);
+ draw_sprites(machine,bitmap,cliprect,0,spriteram_2);
+ return 0;
+}